Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af1e0cea94b9548…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 23:56:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 706a7d187cb812b32d44e870a33f0f78 SHA-1: e71c68534ccd5104c4785f8c94fc7e35792b2033 SHA-256: 7af1e0cea94b95483d74166ef14ca18e68e7101cba68dc392f7191d78139eafe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/coin-master-free-coins-2021-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pokemon-go-free-key_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-now_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005125.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5125 24652 bytes
SHA-256: 6cc3cbd6fa828c225e25f2b0a7c1ad9487ac7370da506dbe9d603843f006c4ca
font_01_sfnt_off000089f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F6 19440 bytes
SHA-256: 743946781bfce2c03f2b15bab10f5b4f539576b78c74a6e1ff9c7771df9954be

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